the first satellite into orbit. the u.s. and other countries are saying it was miss i missie testing, banned by the united nations. i'm marianne rafferty. now, back to "fox files." >>> we are here in grand central terminal in new york city. every day, 700,000 people pass through here which means that superdogs like holland have a very important job to do especially in a post 9/11 world. here is what it takes to become a four legged hero he. ♪ ♪ >> before they could do this, they all start out like this. fox files cameras got a first-hand look at the department of defense military working dog program at lackland air force base where puppies learn to become warriors. spread across nearly 9,000-acres in san antonio, texas, the base is home to the 341st training squadron. >> the purpose is to procure, train and produce handlers and dogs. >> casey stevens is chief of the dog training school at lackland. >> i love to see them evolve from knowing nothing to being able to do everything that they do overseas and in law enforcement. we say zero to hero in 120 days. >> the wags arrive for training.